16
6
6..7
7 W
Wa
atte
err G
Go
ov
ve
errn
no
orr
T
To
o cclle
ea
an
n
- Turn off the cold water supply to the appliance and
drain into receptable.
- Remove the governor situated in the base of the
water section (A) (see fig. 21).
- Clean the components with water and grease see
Section 6.11.
- Check that the spring loaded piston moves freely.
- Replace in reverse oder.
6
6..8
8 G
Ga
ass a
an
nd
d W
Wa
atte
err F
Fiilltte
errss
G
Ga
ass a
an
nd
d w
wa
atte
err iin
nlle
ett ffiilltte
errss a
arre
e ffiitttte
ed
d b
be
ettw
we
ee
en
n tth
he
e
iin
nlle
ett sse
errv
viicce
e cco
occk
kss a
an
nd
d tth
he
e a
ap
pp
plliia
an
ncce
e..
- To clean, turn off the gas supply at the meter and
the service cocks, unscrew the union nuts atta-
ching the cocks to the appliance and remove the
filters (see fig. 22).
- Clean the filters by blowing or washing in water, DO
NOT USE ANY SOLVENTS.
- Replace ensuring that the coarse filter is fitted in the
water inlet and the fine filter in the gas inlet.
- Turn on the gas supply and open both water and
gas service cocks.
- Test for soundness.
6
6..9
9 M
Miiccrro
ossw
wiittcch
h
The microswitch operating mechanism is factory set and if the microswitch requires replacement or adjustment
see Section 5.4. and proceed as in Section 7.12 and 7.13.
F
Fiig
g.. 2
21
1
F
Fiig
g.. 2
22
2
6
6..1
10
0 P
Prre
essssu
urre
e ssw
wiittcch
h
The pressure switch is factory set and it the pressure switch requires adjustment or replacement, see Section 5.5.
and proceed as in Section 7.10 and 7.11.
6
6..1
11
1 G
Grre
ea
assiin
ng
g o
off C
Co
om
mp
po
on
ne
en
nttss
Care should be taken during the annual service of an appliance to grease the gas valve spindle (see Section 6.6)
water Governor (see Section 6.7) and the bearing plate spindle (see Section 7.5). Use silicone grease.
6
6..1
12
2 H
He
ea
att IIn
np
pu
utt
It is a requirement of the Gas Safety (Installation and Use) Regulations 1984 that the burner pressure and gas
rate are checked each time an appliance is serviced, likewise the service engineer should satisfy himself with
regard to gas soundness and the adequacy of combustion and ventilation air if this is appropriate.
The heat input is preset and non-adjustable.
The heat input and burner pressure should be checked (see Section 1.3).
If the heat input/burner pressure is not correct check the working pressure at the pressure test point on the gas
service cock. This should be 20 mbar (8 in wg).
The gas installation should be examined for any possible blockage if the pressure is incorrect.
